/*
 * Copyright (C) 2009 M. Hautle.
 * 
 * This file is part of TrackedBean.
 * 
 * TrackedBean is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any later version.
 * 
 * TrackedBean is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License along with TrackedBean. If not, see <http://www.gnu.org/licenses/>.
 */
package ch.trackedbean.validator.defaultValidators;

import ch.trackedbean.validator.*;

/**
 * Abstract validator implementing an default message handling.<br>
 * <b>A property validator has to be stateless!</b>
 * 
 * @author M. Hautle
 */
public abstract class AbstractValidator implements IPropertyValidator {
	/** The error description. */
	protected IErrorDescription error;

	/**
	 * Validates the given value.
	 * 
	 * @param value The value to check
	 * @return True if the value is valid
	 */
	protected abstract boolean isValid(Object value);

	/**
	 * {@inheritDoc}
	 */
	@Override
	public IErrorDescription validate(Object value) {
		if (isValid(value))
			return null;
		return error;
	}
}
